Accelerator for automobile engines



June 23,1925. Q 1,543,285

C. E. FREDERICKSON ACCELERATOR FOR AUTOMOBILE ENGINES Filed Aug. 20, 1923 Patented June 223, "2925.

PATENT ()FFECE.

CLAYTON E. rnnnnnroxsolv. or CHICAGO, ILLINOIS.

' ACCELERATOR FOE AUTOBIOBILEENGI NES'.

Application filed August 20, 1923. Serial No. esazea T 0 aZZ whom it may concern: I

Be it known that I, CLAY'ION'E. FRED- ERICKSON, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in an Accelerator for Automobile Engines, of which the following is a specification.

This invention relates to means, commonly known as accelerators, for regulating the throttle valve between the carburetor and the intake of automobile engines, and has for its objects:

To provide a structural formation and associationof parts and mechanisms whereby a combined hand and foot control is at-.

tained in an interconnected manner and without interference of the hand control with the foot control or vice versa.

To provide a construction and arrangement of the pedal base of an accelerator mechanism adapted to afford ease and accuracy in the operation of the'same.

To provide an economical and substantial formation of the bell crank bracket of an -ac-' celerator, adapted to afford an efficient and accurate operation of the parts, with a minimum amount of frictional retardance and without liability to binding of the parts, all as will hereinafter more fully appear.

In the accompanying drawing:

Fig. 1 is a detail perspective view illustrating the general arrangement of parts in the present mechanism;

Fig. 2 is an enlarged detailed plan view of the bell crank, hanger bracket therefor, and associated parts of the mechanism;

Fig. 3 is a sectional elevation of the same;

Fig. 4 is an enlarged detail plan view of the pedal assembly including the foot lever, supporting base, and connections of the mechanism.

Fig. 5 is a side elevation of the same;

Fig. 6 is a transverse section through the base plate used in the pedal assembly, the section being taken through the plane of the pivotal connection of the foot lever therewith; and

Fig. 7 is a view similar to Fig; gshowing a modified arrangement ofthe spring means for the bell crank.

Referring to the drawing, ldesignates the carburetor of a motor vehicle, and-connected to the intake of the engine thereof by the usual fuel supply duct in which is arranged a throttle Valve having an arm 2, by which hereinafter described with the aforesaid arm 2 of the engine throttle valve.

A base plate 5.is secured to the foot board of the vehicle, and is formed with ears 6 for the pivotal support of the pedal lever 7, one end of which is formed. with an expanded foot rest, while the other end has pivotal connection with a connecting rod 8 extending to a bell crank mechanism. As shown, this mechanism includes a hanger bracket 9- arranged forward of the base plate 5 aforesaid, and in lateral relation to .the carburetor 1, and secured in place on the engine frame, usually by the rear bolt of the water hose connectionof the engine. A bell the, manner hereinafter described, with one of its arms pivotally connected to the connecting rod 8 aforesaid, while the other arm of the bell crank has direct connection through a connecting rod 11 with the operating arm 2 of the engine throttle valve.

In, the pivotalconnection of the bell crank 10. to the hanger bracket 9, the bracket is shown as provided with a bottom flange or pivot ear 12 and with an upper flange or pivot ear 13 formed by slitting and bending the metal of the bracket body (see Fig. 3). Arranged in aligned orificesin the ears 12 and 13 is a pin 14 forming a pivot for the bell crank 10 in its arrangement between said ears. The pivot pin l l may extend a distance above the upper pivot car 12 to form a supporting post for an operating spring as shown in Fig. 3. A coiled spring encircles the post above described, and is provided with oppositely extending portions, one of which has bearing an orifice in the body of the hanger bracket 9, while the other portionis formed with a looped end adapted to engage an arm of the bell crank 10, with the tendency of the spring to resiliently move the bell crank lever into a normal retracted position.

of the hanger bracket 9 and preferably in An internally screw threaded sleeve 16 is fitted into an orifice in the end of one arm of the bell crank 10, and is provided with a stop flange 17 at its upper end adapted to abut against the upper surface of the arm and hold the sleeve in place. Formed midway of the height of the sleeve 16 is a transverse orifice 18 adapted to receive in an adjustable manner the adjacent end of the connecting rod aforesaid. A set screw 19 engages the screw threaded bore of the sleeve 16 and bears against the connecting rod 8 to firmly secure the same at the required adjustment in the receiving orifice therefor in the sleeve 16, and, as so formed, provides a ready means for the assembly and adjustment of the parts.

Pivotally connected at one end to the aforesaid crank arm 1 of the manually adjusted mechanism is a connecting rod 20 that is associated with the steering post of the vehicle. In the present construction the other end of the rod 20 is formed with an angularly disposed eye 21 adapted to encircle the adjacent end ot the aforesaid connecting rod 8 in a manner to permit an ac tive movement of the rod 8 under the infiuence of the bell crank 10, and in a direction towards the arm 4, without any interference with the adjustment at which the arm 1 had been set by its manual actuating means. In a positive or active movement of the crank arm 4, the eye 21 is adapted to have bearing against the arm of the bell crank 10 which has connection with the rod 8, and in an adjustment of said crank arm 4, a corresponding movement of the bell crank 10, and connecting rods 8 and 11, takes place against the stress of the spring 15 aforesaid.

The base plate 5 is shown as provided with pivot ears 6 which may be conveniently struck up from the body of the plate to pivotally receive between them the pedal lever 7. To one side of this lever is an adjustable stop head or button 23 constituting a rest or stop for the foot of the operator whereby the pressure upon the pedal may be better regulated. Such an adjustable stop may include a threaded shank 2 1 adapted to be screwed into a downwardly depending nipple 25 formed by suitably stamping the plate body in the manner shown 'n Fig. 6. By the use of a lock nut 26, the stop .may be secured in any desired position of adjustment.

The assembly of the bell crank with the hanger bracket may include a spring means 15 which is formed and arranged differently than the construction shown in Fig. 8. For example, I have shown in Fig. 7 a bell crank and hanger bracket exactly the same as is elsewhere illustrated, but the pivot pin 1% is not extended above the upper ear 13 to provide an extension for receiving the spring coils. Instead the spring 15 is coiled around the hanger bracket with one end secured thereto in any convenient manner, the opposite spring end being engaged operatively with the bell crank arm 10. Such a construction dispenses with a close bending of the spring such as is necessitated where the spring is coiled around a pivot pin, and consequently preserves in the spring a greater degree of tension than would otherwise be possible.

I claim:

1. In an accelerator mechanism of the type described, the combination of an intermediate bell crank, a hanger bracket formed with upper and lower pivot ears adapted to fit opposite sides of the bell crank, a pivot pin extending through said ears and bell crank and having an upper extension forming a supporting post and a coiled spring encircling said post and having end extensions engaging the bell crank and the bracket respectively.

2. In an accelerator mechanism of the type described, the combination-of an intermediate bell crank, a hanger bracket formed with upper and lower ears adapted to fit opposite sides of the bell crank, a pivot pin extending through said ears and bell crank,

and a coiled spring having end extensions engaging the bell crank and the bracket respectively. 7

3. In an accelerator mechanism of the type described, the combination of an intermediate bell crank, a spring to move the bell crank in one direction, an internally screw threaded sleeve revolubly mounted in one arm of the bell crank and having a lateral orifice intermediate its length, a connecting rod fitting said orifice, and a set screw arranged in the bore of said sleeve and adapted to have bearing against said connecting rod.

4. In an accelerator mechanism of the type described, the combination with a pedal and an engine throttle valve, of connections extending therebetween including a unit wherein is comprised a hanger bracket, a spring actuated bell crank pivotally mounted thereon, and means loosely carried by the bell crank for effecting a swivel connection with an associated part, said associated part co-operating with said means to secure the latter irremovably to the bell crank.

5. In an accelerator mechanism of the type described, the combination of an intermediate bell crank, a spring to move the bell. crank in one direction, a sleeve rotatably mounted in one arm of the bell crank having a transverse orifice therethrough, a connecting rod fitting said orifice, and means movable axially of the sleeve for holding the rod in a fixed position of adjustment within the orifice.

6, In an accelerator mechanism of the the end of one arm of the bell crank, a part extended rotatably through the opening having means Which overlie one side of the bell crank whereby said part is prevented from passing completely therethrough, there being a transverse opening through said part to the opposite side of the bell crank, a connecting rod slidably received through said transverse opening and adapted to prevent disengagement of said part from the bell crank, and'means for securing the rod in a fixed position of adjustment relative to said part.

7. In an accelerator mechanism of the type described, the combination of a base plate having pivot ears, a pedal lever pivoted to said ears, means for connecting the lever with the engine throttle valve, a nipple extending from the plate body to one side thereof and provided With internal threads, a screwv threaded shank having'a stop head adapted to be threaded into said nipple, and a lock nutengaging with the shank and withthe plate adjacent the nipple.

8. In an accelerator mechanism oI the type described, the combination of a base plate from the body of which certain portions are struck up to provide a nipple and pivot ears between which is an opening through the plate, there being threads formed internally of the nipple, a foot rest having a screw threaded shank adapted to be adjustably extended through the nipple, and afoot lever pivotally mounted between the ears and extending through the opening therebetvveen to connect with the engin throttle valve.

CLAYTON E. FREDERIGKSON.

l/Vitness:

EPHRAIM BANNING. 

